The Trion 1300 combines the industry's brightest 2nd generation Cree XM L LEDs in an integrated battery lighting system. Take full advantage of its innovative triple optic LED assembly with 1300 lumens of intense light output, maximizing your beam angle and throw like never before. Internal battery convenience and external battery compatibility makes this light the ultimate choice for avid road and mountain bikers seeking a versatile all in one lighting system. 8 lighting modes: Bicycle: Boost High Medium Low. Special: SteadyPulse Day Flash Slow Flash Walking. SteadyPulse alerts night time motorists with pulses while constantly lighting your path. Day Flash enhances rider visibility in peak daylight. Integrated High capacity Li ion battery with premium grade Panasonic cells. Compatible with approved 7.6v Cygolite external batteries. Regulated power circuitry maximizes brightness over the battery charge cycle. Built in light mode and battery level indicators. Handlebar mount securely clamps to 25.4 to 31.8mm diameter handlebars. This product includes: Trion headunit with integrated battery, wall charger, Locktite tool free handlebar mount.